Oppau, Germany is in the Palatine area, just a few miles
northwest of Mannheim, just a few miles from the Rhine. Here are some maps that
show its location. Oppau is in the center of each map, where the little pushpin
is. The maps are quite large -- about 450K each.

Many people immigrated to the US from Oppau in the first
part of the 18th century. Many of those who immigrated went to the
Palatine area of Pennsylvania near York, with many others going to Meigs County,
Ohio. Here is a
discussion group about them.

Oppau and the neighboring village of Edigheim have been
long occupied. The first documentary
mention of
Edigheim was in 772 and, for Oppau, 808.